A kind of carbon material bead/polymer composite film and its preparation and application

A carbon material and polymer technology, applied in the field of carbon material microbeads/polymer composite film and its preparation, can solve problems such as single reflection and limited light absorption effect

Active Publication Date: 2022-02-18
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the planar surface of many photothermal materials has only a single reflection, which greatly limits the light absorption effect.

Method used

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  • A kind of carbon material bead/polymer composite film and its preparation and application
  • A kind of carbon material bead/polymer composite film and its preparation and application
  • A kind of carbon material bead/polymer composite film and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Embodiment 1: the preparation of carbon nanotube microbead / PMAA composite film

[0096] Add 5 g of carbon nanotubes (CNT) into a flask containing a mixture of concentrated sulfuric acid and nitric acid (volume ratio 3:1), and reflux at 60° C. for 3 hours under continuous stirring. The resulting suspension is repeatedly washed and separated using a semipermeable membrane (dialysis bag). Finally, water-dispersed carbon nanotube powder was obtained after drying at 80°C.

[0097] The above acidified carbon nanotube (aCNTs) powder was made into an aqueous solution with a mass fraction of 4.42wt%, and 4.52gaCNTs aqueous solution and 6g polystyrene (PS) microsphere aqueous solution (10wt%) were added to the beaker, and stirred for 3 hours , ultrasonically dispersed for 2 hours to form aCNTs / PS mixed solution as the dispersed phase. Pour 10mL of dispersed phase into No. 1 syringe on the dual-channel syringe pump, pour 50mL of simethicone into No. 2 syringe, control the adva...

experiment example 1

[0108] Experimental Example 1 SEM image of carbon nanotube microbeads / PMAA composite film as a whole

[0109] The samples used in this experimental example were prepared in Example 1. The SEM figure of the carbon nanotube / pore former microbead prepared in embodiment 1 before calcining, as Picture 1-1 , Figure 1-2 As shown, among them, Figure 1-2 for right Picture 1-1 The figure obtained after scanning the object in magnification, it can be seen that, Picture 1-1 When the surface of the ball in is scanned at a magnification, it can be observed that there are many small balls, and these small balls are polystyrene balls. After calcination, these pellets are all removed by calcination. The structure of carbon nanotube microbeads obtained after calcination is given by diagram 2-1 It can be seen that it is a hierarchical pore structure.

[0110] The overall scanning electron micrograph (300 times) of the sample made in embodiment 1 is as diagram 2-1 As shown, the carb...

experiment example 2

[0112] SEM image of the internal structure of the carbon nanotube microbead / PMAA composite film of Experimental Example 2

[0113] The samples used in this experimental example were prepared in Example 1.

[0114] The internal scanning electron microscope picture (5000 times) of the sample that makes in embodiment 1 is as Figure 2-2 As shown, it can be seen that there is a rich interconnected pore structure inside the sample, and there are obvious pores with a diameter of 300-400nm and 1-10μm. At the same time, PMAA is filled on the porous carbon skeleton.

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Abstract

The invention provides a carbon material microbead / polymer composite film and its preparation and application. In the composite film, the carbon material microbead is a carbon nanotube microbead or a graphene microbead, and the carbon material microbead is a hierarchical hole Structure, the polymer is polyacrylic acid and its derivatives, polyvinyl alcohol, sodium alginate or chitosan, and the composite film also includes a hydrophilic film. The present invention also provides a method for preparing the composite membrane, through the microfluidic method and calcined carbon material, then mix the carbon material microbeads and the polymer aqueous solution evenly, pour it on the hydrophilic membrane after soaking, filter, exchange The carbon nanotube microbeads / polymer composite film is prepared after coupling. The method is simple to operate and environmentally friendly. The prepared composite film is used for solar-driven water evaporation, and the water evaporation rate can reach 1.62kg / m 2 / h.

Description

technical field [0001] The invention relates to the field of solar-driven water evaporation, in particular to a carbon material microbead / polymer composite film applied to solar-driven water evaporation and a preparation method thereof. Background technique [0002] In recent years, due to the rapid growth of population, overexploitation of water resources and water pollution, the problem of water shortage has become a real and urgent problem all over the world. Solar-driven water evaporation, as a promising technology, has received extensive attention due to its sustainability and environmental protection. Especially through efficient solar thermal conversion, solar vapor generation at the air-water interface produces pure water, thus exhibiting better evaporation performance. However, due to the poor light absorption ability of water in the solar spectrum, natural solar-driven water evaporation is very inefficient, so photothermal materials are widely used to heat interfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/26B01D71/08B01D69/12B01D67/00C02F1/44
CPCB01D71/26B01D71/08B01D69/12B01D67/0079C02F1/447
Inventor 孙治尧汪成王淑红韩晓宁郑荣荣虢德超崔国峰奚娅男闫鹏飞马东阁
Owner HEILONGJIANG UNIV
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